Out campaigners have attempted to undermine the pro-EU message of MrBlair and other leading New Labour figures by saying they wanted to join the euro, which has faced financial meltdown in recent years.

Pressed on the issue yesterday, Mr Blair said: “By the way, we never put the issue to the British people on the euro, because the economic case was not clear and unambiguous.

“When these people say, which they often do, ‘you guys said all this about the euro’, I went back and checked and no we didn’t. We said ‘unless there is a clear case economically for joining the euro we won't put it before you’ and we didn’t.”

Asked about whether the UK would ever join the Euro, he said: “There’s no reason for us to take a position for the next 100 years, but there’s no remote possibility of Britain joining the euro for the foreseeable future.”

The comments infuriated Eurosceptics who said it was Gordon Brown, the Chancellor, who scuppered Mr Blair’s enthusiasm for joining the Euro by demanding five economic tests which had to be met before entering.

Mr Blair also dismissed criticism of his high earnings since leaving Number 10, saying: “'I spend 80 per cent of my time on unpaid work, I've just literally spent weeks in the Middle East on the Middle East peace process there.

“I have two foundations, I employ around about 200 people, I have to raise the money and make the money for all of them.”